[do not merge] Add mcp-codemod, an automated v1 to v2 migration tool #3295

Job	Run time
checks / pre-commit	48s
checks / test (3.11, locked, ubuntu-latest)	1m 29s
checks / docs	46s
checks / test (3.12, lowest-direct, windows-latest)	2m 1s
checks / test (3.14, locked, windows-latest)	2m 31s
checks / readme-snippets	12s
checks / test (3.11, lowest-direct, windows-latest)	1m 50s
checks / test (3.13, lowest-direct, ubuntu-latest)	1m 36s
checks / test (3.12, locked, ubuntu-latest)	1m 39s
checks / test (3.14, locked, ubuntu-latest)	2m 16s
checks / test (3.12, locked, windows-latest)	1m 46s
checks / test (3.13, lowest-direct, windows-latest)	1m 53s
checks / test (3.10, locked, ubuntu-latest)	1m 14s
checks / test (3.10, lowest-direct, ubuntu-latest)	1m 10s
checks / test (3.14, lowest-direct, windows-latest)	1m 49s
checks / test (3.10, lowest-direct, windows-latest)	1m 47s
checks / test (3.10, locked, windows-latest)	1m 40s
checks / test (3.11, locked, windows-latest)	1m 38s
checks / test (3.13, locked, windows-latest)	1m 46s
checks / test (3.13, locked, ubuntu-latest)	1m 6s
checks / test (3.12, lowest-direct, ubuntu-latest)	1m 33s
checks / test (3.14, lowest-direct, ubuntu-latest)	1m 14s
checks / test (3.11, lowest-direct, ubuntu-latest)	1m 29s
all-green	3s
	35m 16s

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